PD21/22: high efficiency for a variety of applications

The external PD 21 and PD22 power supplies combine space-saving design with strong performance. They can be used around the world because they automatically adapt to different national voltages. Only the corresponding pluggable mains cable with an input voltage from 100 to 240 V AC is required.

The PD21 and PD22 can be combined with all OKIN drives; this makes them ideal for a wide range of bedding and seating applications. Thanks to their electronic switched-mode power supply technology (SMPS), the external power supplies are more efficient, more compact and lighter. They deliver a constant output voltage that is independent of the input voltage. They also have very low standby current consumption (according to EU energy efficiency class VI) and comply with the Ecodesign Directive 2009/125/EC. 

PD21/22: external power supplies ensuring maximum safety

The external power supplies also feature an NTC temperature sensor, primary fuse, overload protection and a short-circuit proof output. Optionally, the PD21 can be retrofitted with two 9-volt batteries (6LR61) to enable emergency lowering during a mains power outage.


Practical compact design

Can be combined with the Okin control units

More that meets the European Directive for SMPS (EU Energy Efficiency Class V)

Electronic overload switch-off


Control unit


Input voltage

100 – 240 V AC

Output voltage

29 V DC

Output power


Power cable

Pluggable, input voltage 100 – 240 V AC

Emergency lowering mechanism

Only for PD21 (two 9-volt batteries (6LR61))


NTC temperature sensor
Primary fuse
Overload protection
Overload current switch-off
Output protected against short circuits

Housing colour

Lower housing section: black (RAL 9005)

Protection degree


Relative humidity

30% - 75%

Ambient temperatures

+10°C - +40°C

Status display

LED operating status indicator (green)

Certifications / Approvals

TÜV/GS; UL, KC, CCC, EMC, FCC/IC, RCM, EAC, PSE, RoHS, CB, Level VI, IEC60335-1, EN60335-1, EN62233
For the display of Youtube, it is necessary that you accept YSC cookies. For more information, please see our privacy policy.